Chemistry Commons^™

A Chemical Extraction Study Of Lead Contaminated Soil From Granite City, Il, Yan Zhang

Masters Theses

Granite City, IL, surface soil ( 0-10 cm ) contaminated with lead was studied by both single- and a four-step sequential chemical extraction procedures designed to establish the partitioning, mobility and availability of lead in soil. The five fractions corresponding to the selected extractants were exchangeable, carbonates-bound, Fe-Mn oxides bound, organic matter and residual. Lead contamination of the soil was determined as a function of particle size and soil depth.

The contaminated sample had the highest lead content of 573.1 mg/kg at the 4 cm soil depth level, and on average was about 8.8 times that of background soil. Most …

Computational Studies Of Hydroboration: Remote Functional Groups And Ring Size Effects, Sarah Liberty Olbrich

Honors Theses

This study is a preliminary computational study of the energies of complex molecules. We are looking at the roles of remote heteroatoms in the hydroboration of propellane systems and ring size effects in the solvolysis of cyclic alkyl halides was examined using computational methods. Geometry and transition state optimizations were done using semi empirical (MNDO. AMI) and ab initio (STO-3G, 3-2IG, and 6-31G*) methods. Attempts to correlate computational results with previously reported data will be presented.

Suspended Particulate Matter And Sediment Of Penobscot Estuary, Craig M. Pochini

Honors Theses

An automated scanning electron microscope with an energy dispersive spectrometer was used to gather morphological and chemical information on individual particles from the suspended particulate matter of the Penobscot Estuary and the sediment of Goose Cove/Pond. The goals of the Penobscot Estuary study were to investigate the transport of particles into and through an estuary, the speciation of elements, the abundance of heavy metals, and the background levels of heavy metals. The majority of particles were aluminosilicates originating from a riverine source. Heavy metals were not abundant in the Penobscot Estuary. The objectives of the Goose Cove/Pond study were to …

Azo Dyes Based On 1,10-Phenanthroline, Minchong Mao

Masters Theses

A series of new phenanthroline based azo-dye ligands, produced by diazotizing 5-amino-1,10-phenanthroline (5-NH₂-phen) and then coupling this intermediate to a variety of coupling components, has been synthesized and characterized. The coupling components used were β-naphthol, phenol, and 2,6-dimethylphenol, and the three dye ligands were named phen-azo-β-naphthol, phen-azo-p-phenol, and phen-azo-2,6-dimethylphenol, respectively. ¹H-NMR and IR spectra showed that the dyes exist primarily in the azo form in DMSO solution and as solids. UV-Vis spectra (in MeOH) showed intense (ε ≅ 10⁴ M^-1cm^-1) absorptions ranging from 380 nm to 500 nm for these ligands.

The …

Syntheses Of Monometallic And Bimetallic Pd(Ii) Catalysts Supported On Polymer Surface And Their Applications In Organic Syntheses, Qin Jian Yu

Master's Theses

No abstract provided.

Glycals : An Extended Study Of The Ferrier-Dimerization, Andreas H. Franz

University of the Pacific Theses and Dissertations

C-linked disaccharides were synthesized from 3,4,6-tri-O-acetyl-D-glucal 1 (1,5- anhydro-3,4,6-tri-O-acetyl-1,2-dideoxy-D-arabino-hex-I-enopyranose), 3,4,6-tri-O- acetyl-D-galactal 2 (1,5-anhydro-3,4,6-tri-O-acetyl-1,2-dideoxy-D-lyxo-hex-1- enopyranose) and 3,4-di-O-acetyl-L-fucal 3 (1,5-anhydro-3,4-di-O-acetyl-1,2,6-tri-deoxy- L-lyxo-hex-1-enopyranose) under Lewis acid catalysis (Scheme 1) and compound 4 was further derivatized at the double bond. Dihydroxylation of the glucose dimer 4 gave high allo-diastereoselectivity. The reactions used in the derivatization of 1 were subsequently applied to 2 and 3. The overall yield of 3 was improved to 70 %. All three glycals (10% solution in toluene) reacted quickly with boron trifluoride to give dimerization products in 40-60% yield. Futile attempts at de-O-acetylation of the 2',3'-unsaturated dimer revealed the necessity of …

Efficient Implementation Of Image Compression-Postprocessing Algorithm Using A Digital Signal Processor, Nadir Sinaceur

Dissertations and Theses

In this thesis, an attempt has been made to develop a fast way to implement a post-processing algorithm for image compression. All the previous tests for this postprocessing algorithm, which we will present, have been only software based and did not consider the time parameter.

For this purpose a new algorithm is used to compute the 2-D DCT transform. This change made the process a lot faster on a Spare 5 workstation. We have then decided to further increase the speed of the post-processing scheme by implementing it on the ADSP21020 chip.

The results show that such a chip can …

Novel Palladium (Ii) Catalysts For Asymmetric Synthesis, Arab El-Qisairi

Dissertations

No abstract provided.

Multinuclear Magnetic Resonance Studies Of Anion Binding To Copper, Zinc-Superoxide Dismutase, And Of Lithium Transport And Binding In Cultured Neuroblastoma Cells, Cherian Zachariah

Dissertations

No abstract provided.

Development Of Crosslinking Reagents, And Intra- And Intermolecular Multi-Linking Hemoglobin Molecules As Potential Blood Substitutes, Yaguo Zheng

Dissertations

No abstract provided.

A Multinuclear Magnetic Resonance Study Of Cesium And Chloride Distribution In Human Erythrocyte Suspensions, Wanrong Lin

Dissertations

No abstract provided.

Asymmetric Synthesis By Palladium (Ii) Catalysis: Chirality Transfer And New A Symmetric Catalytic System, Othman Hamed

Dissertations

No abstract provided.

Oxidative Reactions In Normal And Sickle Hemoglobin-Lipid Mixtures Under Various Conditions, Merita Nirmali Dias

Dissertations

No abstract provided.

Competition Between Li+ And Mg2+ For Human Rbcmembrane Phospholipids And Guanine Nucleotide Binding Proteins, Chandra Srinivasan

Dissertations

No abstract provided.

Ionic Interaction Studies Of Bovine Copper, Zinc-Superoxide Dismutase, Hanan A. Hasan

Dissertations

No abstract provided.

Ph And Osmolality Effects On Lipid-Enhanced Sickle And Normahemoglobin Oxidation, Sharron Kay Jenkins

Dissertations

No abstract provided.

Molecular Dynamics Of The Hammerhead Ribozyme, Vasant T. Gandhi

Master's Theses

No abstract provided.

Molecular Dynamics Of Crosslinked And Normal Hemoglobins, Liang Zhao

Master's Theses

No abstract provided.

The Application Of Matrix Assisted Laser Desorption Ionization Time Of-Flight Mass Spectrometry (Maldi Tof Ms) For Dna Adducts And Cross-Linked Hemoglobin Analysis, Xiaomei Gu

Master's Theses

No abstract provided.

Effects Of Perinatal Exposure To Cocaine On Sexually Differentiated Gonadotropin Regulation In Rats, Jihun M. Lee

Master's Theses

No abstract provided.

Preparation And Reactivity Of Acyclic (Pentadienyl)Iron(1+) Cations: Applications To Organic Synthesis, William A. Donaldson

Chemistry Faculty Research and Publications

No abstract provided.

Hexakis(Dimethylformamide)Bis(Hexaphenylcyclohexasiloxanehexaolato)Hexacopper(Ii) Dimethylformamide Solvate, Sergey V. Lindeman, Olga I. Shchegolikhina, Yulia A. Molodtsova, Alexandr A. Zhdanov

Chemistry Faculty Research and Publications

The sandwich-like title complex, hexakis(dimethylformamide)-1O,2O,3O,4O,5O,6O-bis[2,4,6,8,10,12-hexaphenylsiloxane-2,4,6,8,10,12-hexaolato(6-)-1:2²O¹,2:3²O²,3:4²O³,- 4:5²O⁴,5:6²O⁵,1:6²O⁶]hexacopper(II) tetrakis(dimethylformamide) solvate, [Cu₆(C₃H₇NO)₆{(C₆H₅)₆O₁₂Si₆}₂].4C₃H₇NO, is comprised of two regular crown-shaped macrocyclic hexadentate organosiloxanolate ligands chelating a flat Cu₆ hexagon, as in the ethanol-solvated analogue investigated previously. The title complex has a more distorted shape …

N-Methylbenzothiazole-2(3H)-Selone, C8H7Nsse, Steinar Husebye, Sergey V. Lindeman, Martin D. Rudd

Chemistry Faculty Research and Publications

The crystal structure of N-methyl1,3-benzothiazole-2(3H)-selone, (mbts) has been studied to estimate the changes in the molecular geometry of the mbts ligand upon coordination. Hypervalent complexes of mbts with Te^II and I^I have been studied by us previously. A significant elongation of the Se=C bond [from 1.817 (7) in mbts to 1.85-1.88 Å in the complexes] was found, but there were no significant changes in the other geometric parameters of the ligand. The only other bond-length decrease of note was for SeC-NMe [from 1.35 (1) in mbts to 1.32-1.34 Å in the complexes]. Thus, only the …

Microwave Plasma Chemical Vapor Deposited Diamond Tips For Scanning Tunneling Microscopy, Sacharia Albin, Jianli Zheng, John B. Cooper, Weihai Fu, Arnel C. Lavarias

Electrical & Computer Engineering Faculty Publications

Diamond microparticles were grown on etched tungsten wires using a microwave plasma-assisted chemical vapor deposition process. The apexes on cubo-octahedral particles bound by {100} and {111} facets were effectively used as tunneling tips for scanning tunneling microscopy. The atomically resolved surface image of highly oriented pyrolytic graphite was acquired. Tunneling characteristics revealed a higher electron emission from the diamond tips than that from the platinum–iridium tips. The same diamond tips were used to produce surface indentation and its image. © 1997 American Institute of Physics.

Development Of A Tire Pyrolysis Process And Apparatus Using Steam Displacement Of The Combustible Atmosphere, Timothy Whitney Burrell

Dissertations and Theses @ UNI

It is the purpose of this research to convert a batch vacuum pyrolysis process into a pyrolytic process that operates at ambient air pressure with the capabilities of a continuous material flow operation. Further, it is important to optimize the conditions of the pyrolysis process so as to reduce costs of operation and to reasonably maximize products that have value. Steam will be used to displace the combustible atmosphere which enables ambient air pressure operation and elimination of need for inert carrier gasses or evacuation of the apparatus. The use of steam also allows water traps to be used as …

Characterization Of Iron Oxides And Atmospheric Corrosion Of Steel, Sei Jin Oh

Physics Theses & Dissertations

The study of corrosion behavior was performed using three different analytical techniques, which provided information on the formation, development and layering of iron oxides on the corrosion products as a function of atmospheric conditions, exposure time and type of steel. In particular, the protective layer formed on weathering steel was investigated as a function of different amounts of alloying elements in the steel, atmospheric conditions and exposure times. Combined together, the results provided a better understanding of the atmospheric corrosion behavior of steel, and formed a part of database of the atmospheric corrosion characteristics.

Accurate characterization of the iron oxides …